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Please ttell methe answer...... 
And please solve the question step by step............ 
8 months ago

Answers : (1)

Khimraj
2873 Points
							
work done in bringing
first charge = 0
second charge = Q*(potential due to already present charge) = Q*KQ/a = KQ2/a
third charge = Q*(potential due to already present charge) = Q*(KQ/a + KQ/\sqrt{2})
 
fourth charge = Q*(potential due to already present charge) = Q*(2KQ/a + KQ/\sqrt{2})
and total energy of system will be equal to sum of all above work done.
8 months ago
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